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/* Definitions for boot script parser for Mach. */
/* Written by Shantanu Goel (goel@cs.columbia.edu). */
/* Error codes returned by boot_script_parse_line()
and boot_script_exec_cmd(). */
#define BOOT_SCRIPT_NOMEM 1
#define BOOT_SCRIPT_SYNTAX_ERROR 2
#define BOOT_SCRIPT_INVALID_ASG 3
#define BOOT_SCRIPT_MACH_ERROR 4
#define BOOT_SCRIPT_UNDEF_SYM 5
#define BOOT_SCRIPT_EXEC_ERROR 6
#define BOOT_SCRIPT_INVALID_SYM 7
#define BOOT_SCRIPT_BAD_TYPE 8
/* Legal values for argument `type' to function
boot_script_set_variable and boot_script_define_function. */
#define VAL_NONE 0 /* none -- function runs at exec time */
#define VAL_STR 1 /* string */
#define VAL_PORT 2 /* port */
/* This structure describes a command. */
struct cmd
{
/* Path of executable. */
char *path;
/* Task port. */
mach_port_t task;
/* Argument list. */
struct arg **args;
/* Amount allocated for `args'. */
int args_alloc;
/* Next available slot in `args'. */
int args_index;
/* List of functions that want to be run on command execution. */
struct sym **exec_funcs;
/* Amount allocated for `exec_funcs'. */
int exec_funcs_alloc;
/* Next available slot in `exec_funcs'. */
int exec_funcs_index;
};
/* The user must define this function. Load the image of the
executable specified by PATH in TASK. Create a thread
in TASK and point it at the executable's entry point. Initialize
TASK's stack with argument vector ARGV of length ARGC whose
strings are STRINGS. STRINGS has length STRINGLEN.
Return 0 for success, non-zero otherwise. */
int boot_script_exec_cmd (mach_port_t task, char *path, int argc,
char **argv, char *strings, int stringlen);
/* The user must define this function. Load the contents of FILE
into a fresh anonymous memory object and return the memory object port. */
mach_port_t boot_script_read_file (const char *file);
/* Parse the command line LINE. This causes the command line to be
converted into an internal format. Returns 0 for success, non-zero
otherwise.
NOTE: The parser writes into the line so it must not be a string constant.
It is also the responsibility of the caller not to deallocate the line
across calls to the parser. */
int boot_script_parse_line (char *cmdline);
/* Execute the command lines prevously parsed.
Returns 0 for success, non-zero otherwise. */
int boot_script_exec (void);
/* Create an entry in the symbol table for variable NAME,
whose type is TYPE and value is VAL. Returns 0 on success,
non-zero otherwise. */
int boot_script_set_variable (const char *name, int type, int val);
/* Define the function NAME, which will return type RET_TYPE. */
int boot_script_define_function (const char *name, int ret_type,
int (*func) (const struct cmd *cmd, int *val));
/* Returns a string describing the error ERR. */
char *boot_script_error_string (int err);
void safe_gets (char *, int);
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